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Comparison of nastran analysis with ground vibration results of uh-60a nasa/aefa test configuration
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Seible, Frieder Idosor, Florentino |
| Copyright Year | 1990 |
| Description | Preceding program flight tests, a ground vibration test and modal test analysis of a UH-60A Black Hawk helicopter was conducted by Sikorsky Aircraft to complement the UH-60A test plan and NASA/ARMY Modern Technology Rotor Airloads Program. The 'NASA/AEFA' shake test configuration was tested for modal frequencies and shapes and compared with its NASTRAN finite element model counterpart to give correlative results. Based upon previous findings, significant differences in modal data existed and were attributed to assumptions regarding the influence of secondary structure contributions in the preliminary NASTRAN modeling. An analysis of an updated finite element model including several secondary structural additions has confirmed that the inclusion of specific secondary components produces a significant effect on modal frequency and free-response shapes and improves correlations at lower frequencies with shake test data. |
| File Size | 16667512 |
| Page Count | 101 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910001020 |
| Archival Resource Key | ark:/13960/t5bc8w51k |
| Language | English |
| Publisher Date | 1990-09-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Finite Element Method Ground Tests Rotors Uh-60a Helicopter Mathematical Models Nastran Vibration Tests Aircraft Structures Aerodynamic Loads Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
